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PROTEINS AND PROTEIN METABOLISM- Part 23
See all quizzes of PROTEINS AND PROTEIN METABOLISM- Part 23 here:
1 All the following amino acids are optically
active except
(A) Tryptophane (B) Phenylalanine
(C) Valine (D) Glycine
2. Proteinous substances which catalyze
biochemical reactions are known as
(A) Activators (B) Catalysts
(C) Enzymes (D) Hormones
3. Insulin is a protein which controls
(A) Blood clotting (B) Metabolic pathway
(C) Digestion (D) Kreb’s cycle
4. Proteins which are responsible for defence
mechanism are called
(A) Antimetabolites (B) Antibodies
(C) Antimycins (D) Apoproteins
5. When the net charge on an amino acid is
zero, the pH is maintained as?
(A) 4.5 (B) 11.2
(C) 7.0 (D) 9.1
6. Isoelectric point of amino acids is used for
(A) Crystallisation (B) Precipitation
(C) Solubility (D) Reactivity
7. Xanthoproteic test is positive in proteins
containing
(A) Sulphur amino acids
(B) α-Amino acids
(C) Aromatic amino acids
(D) Aliphatic amino acids
8. All α-amino acids give positive
(A) Million’s test (B) Biurete test
(C) Xanthproteic test (D) Ninhydrine test
9. N-terminal amino acids of a polypeptide
are estimated by
(A) Edmann reaction (B) Sanger’s reagent
(C) Formaldehyde test (D) Ninhydrine reaction
10. Million’s test is positive for
(A) Phenylalanine (B) Glycine
(C) Tyrosine (D) Proline
11. Indole group of tryptophan responses
positively to
(A) Glyoxylic acid (B) Schiff’s reagent
(C) Biuret test (D) Resorcinol test
12. Guanidine group of argentine gives
positive test with
(A) Lead acetate
(B) Sakaguchi reagent
(C) Tricholoroacetic acid
(D) Molisch’s reagent
13. Thiol group of cysteine gives red colour
with
(A) Sodium acetate
(B) Lead acetate
(C) Sodium nitroprusside
(D) Barfoed’s reagent
14. Protein deficiency disease is known as
(A) Cushing’s disease
(B) Fabry’s disease
(C) Parkinson’s disease
(D) Kwashiorkor and marasmus
15. A vegetable source of protein is
(A) Egg plant
(B) Soyabean
(C) Tree of the Heaven
(D) Devil’s dung
16. Oxaloacetate is converted to aspartic acid
by
(A) Reductase (B) Oxidase
(C) Transminase (D) Catalase
17. Deficiency of biotin results in decrease in
(A) Amino acid synthesis
(B) Lipid synthesis
(C) Kidney
(D) Fatty acid synthesis
18. The precursor of bile salts, sex hormones
and vitamin D is
(A) Diosgenin (B) Cholesterol
(C) Campesterol (D) Ergosterol
19 Unsaturated fatty acids is known as
(A) Non-essential fatty acids
(B) Essential fatty acids
(C) Cerebrosides
(D) Phospholipids
20 Biuret test is specific for
(A) Two peptide linkage
(B) Phenolic group
(C) Imidazole ring
(D) None of these
21. Most of calcium is present in bone, but 2%
present in soft tissue and the blood is
called
(A) Calcinated blood (B) Solidified blood
(C) Physiological blood(D) Colloidal blood
22. Calcium present with protein is known as
free while in salt form is called as
(A) Bound (B) Precipitated
(C) Solid (D) Polymorphs
23. The following ions help in enzymatic
transfer of phosphate from ATP to pyruvic
acid:
(A) Sodium (B) Calcium
(C) Magnesium (D) Potassium
24. International enzyme commission classifies
enzymes into
(A) Three classes (B) Six classes
(C) Four classess (D) Ten classes
25. Michaelis – Menten equation is used to
explain the effect of substrate concentration
on
(A) Carbohydrate (B) Enzyme
(C) Lipid (D) Protein
26. The pH at which an enzyme has maximum
activity is known as
(A) Isoelectric pH (B) Optimum pH
(C) Low pH (D) High pH
27. Degradation of proteins to amino acids,
glucose from carbohydrates and fatty
acids from lipids is known as
(A) Anabolism (B) Metabolism
(C) Catabolism (D) Cretinism
28. During glycolysis of glucose the energy
liberated in the absence of oxygen is
known as
(A) Oxygenesis
(B) Glyconeogenesis
(C) Glycogenolysis
(D) Anaerobic fermentation
29. Deficiency of urea cycle enzymes results
into accumulation of citrulline argininosuccinate
arginine in the liver resulting in increasing
concentration of …….. in the blood.
(A) Calcium (B) Sodium
(C) Ammonia (D) Lipid
30. Accumulation of trytophan in blood is
known as
(A) Pompe’s disease (B) Wilson’s disease
(C) Wolman’s disease (D) Hartnup’s disease
31. Lymphocytes are responsible for the formation
of
(A) Serum (B) Plasma
(C) Antibody (D) Calcium
32 Platelets contain an enzyme which has
important role in clotting in blood. This
enzyme is known as
(A) Cholinesterase (B) Transaminase
(C) Decarboxylase (D) Thrombokinase
33. Treatment of pentoses with a concentrated
mineral acid yields a cyclic aldehyde
known as
(A) Pentaldehyde (B) Cyclopental
(C) Hexaldehyde (D) Furfural
